2020-2021 Common Denominator

What is the least common denominator of 1/7 and 3/6?

• 14
• 21
• 7
• 42

What is the least common denominator of 6/8 and 4/12?

• 12
• 24
• 8
• 16

What is the least common denominator of 2/6 and 7/8?

• 36
• 8
• 18
• 24

What is the least common denominator of 1/4 and 1/3?

• 4
• 3
• 12
• 8

What is the least common denominator of 1/4 and 2/5?

• 5
• 25
• 10
• 20

What is the least common denominator of 2/4 and 4/7?

• 24
• 7
• 42
• 28

Which of these numbers could NOT be a common denominator for these two fractions?
2/4   and   3/8

• 32
• 12
• 8
• 24

Which of these numbers could NOT be a common denominator for these two fractions?
1/6   and   1/4

• 12
• 18
• 24
• 36

What do you need to have when adding unlike fractions?

• common denominator
• common numerator
• common numerator and denominator

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3
• 4
• 24
• 12